#include <REGX52.H>

void Delay(unsigned int xms)		//@11.0592MHz
{
	
	unsigned char i, j;
	while(xms)
	{

	i = 11;
	j = 190;
	do
		{
			while (--j);
		} while (--i);
	
	xms--;
	}
}

void main()
{
	while(1)
	{
		if(P3_1==0)
		{
			Delay(40);
			
			while(P3_1==0);
			Delay(40);
			P2_0=~P2_0;
		}
	
	}
}